yea depend, its also a question on how much your ready to invest..
if the biggest concern is power use, go for LED, if its cost to buy go for a small MH/HPS ..
if your just looking to get started cheap and grow a few plants for personal use, I would recommend a 400W MH/HPS with a cool tube and a 4" ventilation with filter to match, that is in my mind the best "beginner" set up ..
sumthing like this:
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